Esphome + relay + ultrasonic

airwick_kitchen.yaml

esphome:
  name: airwick_kitchen
  platform: ESP8266
  board: nodemcuv2

wifi:
  ssid: "ssid"
  password: "pass"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Airwick Kitchen Fallback Hotspot"
    password: "pass"

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

switch:
  - platform: gpio
    id: relay
    pin: D5
    inverted: True
    restore_mode: RESTORE_DEFAULT_OFF

  - platform: template
    name: "switch_airwick"
    icon: "mdi:spray"
    turn_on_action:
    - switch.turn_on: relay
    - delay: 500ms
    - switch.turn_off: relay
    
  - platform: template
    id: ultra_wick
    lambda: |-
      if (id(ultrasonic_wick).state < 0.07) {
        //id(relay).toggle();
        id(relay).turn_on();
        delay(250);
        id(relay).turn_off();
        delay(1000);
        return true;
      }
      

sensor:
  - platform: ultrasonic
    trigger_pin: D2
    echo_pin: D1
    id: ultrasonic_wick
    update_interval: '0.5s'